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Wednesday, November 27, 2013

#160 - Improving the Safety of Hydrogen Analysis - Nova Model 436 for Generator Monitoring

Many large power generators use hydrogen gas as a coolant. Hydrogen has low density and very good thermal conductivity. It can carry away the heat produced in a generator and thus allow the generator to operate at a higher power output.




The Nova Model 436 is an excellent choice for continuous monitoring of the hydrogen atmosphere in a generator. It offers the following analysis ranges:

Range 1: 0-100% Hydrogen in Air
Range 2: 0-100% Hydrogen in CO2
Range 3: 0-100% Air in CO2




This model is similar to the portable Model 380 mentioned in this post. When a generator shutdown is scheduled, it is recommended that the continuous analyzer is used to monitor the purge process, while a portable analyzer is also connected and used as a back-up monitor.

We have been asked recently by some power companies to consider offering an additional interesting feature to the Nova Model 436.

In some cases, an unsafe condition has developed when the continuous H2 purity analyzer has been accidentally switched to the wrong range and left to operate that way. The analyzer will now be looking for an incorrect combination of gases and will not report a reliable result. Because H2 purity is an important parameter to monitor during normal generator operation, the analyzer should remain set to the correct range for reliable results.

Would this feature be of interest to you? 

To ensure that the purity range is activated at all times during normal generator operation, an explosion-proof lock-enabled switch can be provided. The purity range would be always locked on, and only a key could disable it and enable the purge ranges. The key would stay in the slot during purge, and only be removable when the purity range is selected again. Perhaps the key would be kept in the supervisor’s office when not in use.



If this is of interest to you, contact Nova for details.

1-800-295-3771
sales at nova-gas dot com
websales at nova-gas dot com
http://www.nova-gas.com/
https://twitter.com/NOVAGAS
http://www.linkedin.com/company/nova-analytical-systems-inc-
http://www.tenovagroup.com/

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